OAI/Geometry/SurfaceImmersion/Whitney/RegularCrosscapRepresentatives.lean

GitHub source file

1 declarations, 0 contain sorry, 0 declared as axioms

An unconditional generic map to three-space with finitely many singularities, expressed using the actual derivative-direction map.

  1. theorem OAI.ClosedSurfaceR4.FiniteOrderSmoothing.exists_regular_crosscap_map line 16